Film information exchange system using self-clocking encoded start and
A magnetic layer is included as an additional layer in a photographic film.
Information exchange between various uses of the film, such as the camera
user, the dealer and photofinisher, is facilitated by recording data in
dedicated frame-limited longitudinal track(s) in said film. All data is
recorded on the film using a self-clocking three-part code in order to
provide automatic data synchronization between the various users without
requiring film transport at the same speed or even a uniform speed when
reading and writing data. Three-part encoded binary characters uniquely
representing start and stop sentinels respectively, are recorded at the
beginning and end of the track respectively and facilitate automatic
detection of the direction of film strip transport.
Wash; Michael L. (Pittsford, NY), Whitfield; Arthur A. (Rochester, NY) |
Eastman Kodak Company
April 18, 1991|
|Current U.S. Class:
||355/40 ; 355/41; 396/319; 430/496; 430/501; G9B/5.235|
|Current International Class:
||G03D 15/00 (20060101); G03B 27/46 (20060101); G11B 5/633 (20060101); G11B 5/62 (20060101); G03B 027/52 ()|
|Field of Search:
355/40,41,77 360/1,2,3 352/37,92,236 354/72,75,76,105,106,109
Hix; L. T.